What is trailing nexus?

Most states make you keep filing for a while after you drop below their threshold. California runs through the next full calendar year. Texas uses a rolling twelve months. We track each state's rule so you cancel on the right date, not too early.

Will I get in trouble for canceling a permit?

Not if you do it in the right order. We file every outstanding and final return first, then guide the cancellation. The real risk is canceling early or skipping a final return, which is exactly what we prevent.

Which platforms do you support?

Amazon, Shopify and WooCommerce, with BigCommerce, Etsy, Walmart and eBay supported through manual entry. You can also enter your states by hand on any platform.

Do you file my returns?

Yes. During the wind-down we file the zero-dollar returns so nothing lapses, and once you're deregistered in a state there's nothing left to file.

How is this different from Avalara or TaxJar?

They help you register and file more. We help you deregister and file less. We only charge for the states you keep.

No. TrailingZero is software that flags deregistration opportunities and handles filings. For complex situations we tell you when to bring in your accountant.

Is TrailingZero live?

Yes. Free audits are live now — run yours in minutes. Connect a store read-only or enter your registered states by hand to see which you can cancel and what it saves.

What is the economic nexus threshold in Colorado?

$100,000 in sales, measured over previous or current calendar year, in effect since December 2018.

Do marketplace sales count toward economic nexus in Colorado?

No, facilitated sales don't count toward your own threshold.

No. This page is general education built from public sources and the rules change often. Confirm your specific situation with the state's tax authority or your accountant before you register or deregister.

Economic nexus

Colorado economic nexus threshold

Colorado's economic nexus rule decides when out-of-state sellers must collect sales tax. Here's the current threshold, how it's measured, and how the transaction-count rule has changed.

By John DoeReviewed by Jane Doe, CPAUpdated June 2026How we verify

Sales threshold: $100,000
Transaction threshold: Removed
Logic: sales only
Measured over: previous or current calendar year
Effective: December 2018

Source: Colorado Department of Revenue — Taxation Division

Nexus & savings calculator

Estimate whether you still have nexus in Colorado — and what canceling could save.

State

Annual sales into Colorado

Transactions (orders) per year

Colorado no longer counts transactions — only sales matter here.

I have physical presence hereFBA/3PL inventory, an employee, or an office in Colorado

Filing frequency

Cost per return

Physical presence
Sales over $100,000
Transactions (not counted here)

Likely eligible to cancel

Based on these numbers you likely no longer have nexus in Colorado. You can usually deregister after clearing the trailing-nexus window and filing your final return.

Trailing nexus: Colorado has limited or no trailing-nexus window — you can generally deregister once your nexus has ended and final returns are filed.

You could stop paying

$600/ yr

How to cancel in Colorado →

Estimate only — general education, not tax advice. Confirm with Colorado's tax authority before you register or deregister.

What is economic nexus in Colorado?

Economic nexus means you can owe sales tax in Colorado based purely on your sales volume there — no physical presence required. It traces to the 2018 South Dakota v. Wayfair decision. Colorado's threshold took effect December 2018.

Today the threshold is $100,000 in sales, measured over previous or current calendar year.

The transaction-count history

Colorado used to trigger nexus at 200 transactions but removed that count in April 2019 — only the sales figure matters now.

That matters because the 200-transaction prong used to catch very small sellers — 200 orders can be just a few thousand dollars of sales. If transactions were the only reason you registered in Colorado, that trigger is gone.

What counts toward the threshold

Gross retail sales (tangible personal property and taxable services) delivered into Colorado, including exempt sales. Marketplace sales facilitated by a marketplace facilitator are EXCLUDED from the seller's threshold calculation.

Marketplace-facilitated sales do not count toward your own Colorado threshold.

Where TrailingZero fits

TrailingZero connects to your store read-only, maps where you actually have nexus state by state, and tracks your sales against Colorado's threshold so you register only when you truly cross it — and deregister when you fall below. During any wind-down it can file the zero-dollar returns so nothing lapses — and you only pay for the states you genuinely keep. Run a free audit anytime; this page is free education either way.

Colorado Economic nexus FAQ

What is the economic nexus threshold in Colorado?: $100,000 in sales, measured over previous or current calendar year, in effect since December 2018.
Did Colorado remove the 200-transaction rule?: Colorado used to trigger nexus at 200 transactions but removed that count in April 2019 — only the sales figure matters now.
Do marketplace sales count toward economic nexus in Colorado?: No, facilitated sales don't count toward your own threshold.
Is this tax advice?: No. This page is general education built from public sources and the rules change often. Confirm your specific situation with the state's tax authority or your accountant before you register or deregister.

See what you can stop paying in Colorado

Run a free audit and see which registrations you can drop — in minutes, no card required.

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Other states

See all states →

Sources

Primary sources reviewed for this page. Data current as of June 2026.

TrailingZerois software, not a CPA or law firm, and this page is general education — not tax or legal advice. State rules and thresholds change frequently; confirm your situation with the state's tax authority or your accountant before you register or deregister. See how we research and review this data in our editorial & accuracy policy.